package com.webserver.core;

import com.webserver.annotation.Controller;
import com.webserver.annotation.RequestMapping;

import java.io.File;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public class HandlerMapping {
    private static Map<String,MethodMapping> mapping=new HashMap<>();
    static {
        initMapping();
    }
    private static void initMapping(){
        try {
            File dir=new File(
                    HandlerMapping.class.getClassLoader().getResource("./com/webserver/controller").toURI()
            );
            File[] subs=dir.listFiles(f->f.getName().endsWith(".class"));
            for(File file:subs){
                String fileName = file.getName();
                String className = fileName.substring(0,fileName.indexOf("."));
                Class cls = Class.forName("com.webserver.controller."+className);
                if (cls.isAnnotationPresent(Controller.class)){
                    Object controller=cls.newInstance();
                    System.out.println(className+"被@Controller标注");
                    Method[]methods=cls.getDeclaredMethods();
                    for (Method method:methods){
                        if (method.isAnnotationPresent(RequestMapping.class)){
                            System.out.println("被@RequestMapping标注");
                            RequestMapping rmg=method.getAnnotation(RequestMapping.class);
                            String value=rmg.value();
                            MethodMapping mm=new MethodMapping(controller,method);
                            mapping.put(value,mm);
                        }
                    }

                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static MethodMapping getMethod(String path){
        return mapping.get(path);
    }

    public static void main(String[] args) {
        MethodMapping mm=getMethod("/myweb/reg");
        Object obj=mm.getController();
        Method method=mm.getMethod();
        System.out.println(obj+":"+method.getName());
    }
   static class MethodMapping{
       private Object controller;
       private Method method;

       public MethodMapping(Object controller, Method method) {
           this.controller = controller;
           this.method = method;
       }

       public Object getController() {
           return controller;
       }

       public void setController(Object controller) {
           this.controller = controller;
       }

       public Method getMethod() {
           return method;
       }

       public void setMethod(Method method) {
           this.method = method;
       }
   }

}
